@bllg Hi Brett, and welcome to the TypeOneNation Forum!
It is usually advisable to ask your insurance company about “In-Network” providers. This information can be obtained by phone call, or more conveniently by looking at the insurance company webpage, logging in and identifying your location. List price for most lab tests is usually very high but your out-of-pocket can be $0.00 for Medically Necessary testing.
Monogenic diabetes often looks like Autoimmune Diabetes [currently called TypeOne, but treatment can be different. Monogenic, or MODI, is caused by a defective gene passed from generation to generation, and can often affect several members of a family. Only about 10% of people accurately diagnosed with Autoimmune Diabetes, T1D, have a first degree relative also diagnosed with T1. I’ve had diabetes for 65 years, and none of my children, or grandchildren display any signs of diabetes.
The JDRF has a program called T1Detect which checks antibodies in an attempt to forecast onset of diabetes in close relatives. Look at the JDRF website - jdrf.org - or, T1Detect - JDRF